Influence of different pigments on the facade surface temperatures

More intensive shades of color are being used with external thermal insulation composite systems (ETICS) on energy-efficient facades. These surfaces heat up extremely and cause damage in ETICS. Based on an analysis of laboratory examinations and practical measurements (test houses) as well as on computations, this paper analyzes commonly used relative luminance (RL) and if this is of an adequate size for the prediction of the surface temperature. Significant issues are: (a) the deviation of the RL limit, (b) the performance capability and temperature advantages of improved pigmentation concepts (infrared reflecting pigments) on ETICS. Additionally, the total solar reflectance (TSR) and its influence on the surface temperature are evaluated.